Sanding machine



July 12, 1927.

E. )J. FISCHER SANDING MACHINE Filed April 15. 1924 3 Sheets-Sheet 1 July 12; 1927.

E. J. FISCHER SANDING MACHINE Filed April 15, 1924 ":5 shee -sheet 2 u y 1927/" FISCHER SANDING MACHINE Filed April 15, 1924 3 Sheets-Sheet 3 HTTORNEY.

efficient belt tightener.

nnwann J. nrsonEnyo-n onnsonnr srnmes, KENTUCKY.

sn vnnve MACHINE.

Application filed a rir s, 1924. Serial No. ,6 5}

My machine belongs to that class of sanding machines which an endlessteit carrying a rough, sanded, emery or other abrasive ,face is operated in connection with a table or work-support upon which the article's to be made smooth or poiished'are supported, the sanding belt being manually pressed down upon the articles to be operated upon, this supporting table being adconsists; efiicient I also provide and approved shaped trucks upon whichthe' supporting tablerests and on which'it can be operated forwardly and backwardly.

Another feature consists in the employinent'of an auxiliary table or pad fo-rsand ng and polishing small .or peculiarly shaped articles. p I

The various features and advantages of my invention-will readily become apparent from readingthe following specification and la m 'In the accompa-nying drawing forming part" of this specificationi 1. i chine,

' Fig.2, is a plan supporting table, p

'FigQg, isan end vie wof the table shown in Fig. 2,

Fig.4, is a View in elevation of the right hand supporting part of standard, looking at same to-ward the-inside thereof, partly broken away and in section,

Fig; 5, is a section on line 55 of Fig. 1,

Fig. 6, is a sect-ion on line 66 of Fig, 7 and i Fig. 7, is a view in elevation of the vpulley employed by me. i

The sanding belt]. is supported upon the spaced posts or standards 2 and 3, which may be of any shape or contour.

At the upper extremity, on the standard 2,, I provide a stationary arm 4: on which i support pulley 5 which revolves on shaft 6.

At the top of the standard 2 I also profront'view of the entire nia- View ofthe holding and form and construction and V} I provideyonthe standard3, a sto'p arm vide a head 7, a similar-head S'being used onetandarcl,8, These'heads having shafts 9 and 10, on which revolve theapulleys 12 and .13, resp C y- Oirstandard 3, I pivotally mount in bear ings'jlti, weight ar'In 14 having the downof the legl5 I provide a hand wheel and screw 17, which bears againstitlielever,1'8

at the point 19 andisfor adjusting the said lever 18. On the arm M I provide' a'weight. 2O WlllCll can be slidably adjusted. AtFt-he upperfend oi the standard 3 I pivotally n iountthe lever 18 in the bearing21,-wlnth lever liasan upwardly" extendinggarin 22.

,wardly extending. leg'lzl At the lowerend At the point 23 I pivot-ally mount thegsid e ad uSt-nient arn 24, which-arm car-res at its upper extremity the shaft 25; which idle; apulley 26; at the lower extremity of said arm 24, I provide a nut amis rew adjust ment 27, (see Figl). with ahand-wheel 28 I Anadjusting screw -29 being inounted'in the br'ack-et30 whlchbracketis secufi'ed to i so 1 ("fight and'loose pulleys 32 and'33 respec;

the upper rm 22 of the lBYQlQlSQ tiv-ely are mounted onthe shaft" l O, see

81, "which prevents the weight'QO and arm 14:; from dropping. below a. given' point."

On the standard 2, securely" fastened to arm 4, I provide brackets 34 whiclrcariy j an auxiliary sanding table-or pad 35".,

The. belt '1' (which is endless), passesov-or pulleys 5, 12, 13, and 26.

The work-supporting table ated upon, is generally situated under-the shown in Fig. 1. -.It ,iscomposed of end upon which I the work to bejsanded, smoothed, or operframes 36 and 37joined t'ogetherb'y housing" 38. Inthe. lower partlof'the frames 36"and 37, I mount the shaft38,-which carries at each end the links 39, 39, one end of each link being fixedly niountedion shaft 38', the

other end being p-ivotally connected tov another link 40, at'point 41. Links 40 are pivotallv connected at their opposite ends to the pins 43. These pins are securely fatstened into the carriages 4 1 which run in the ii-guides 4E5 inside frames 36 and These carriages have at their upper QXtlGl'fiities the brackets 4c6, which in turn hav'e the extending arms 47 and 48.' These arms carry the V-tracks 49, on which travel the V-Wheels 50, the latter being mounted 1n bearings 51, on the bottom side of the work- 'supporting table52, which is formed of a series of strips 53 and carries the operating handle 54.

On the housing 88, I provide brackets 55 in which I journal a shaft 56, having hand .wheel 57, and the worm wheel 58 securely mounted thereon. This worm wheel engages with a worm gear 59, which 18 in turn securely mounted on shaft 88". By turnmg hand wheel 57 the shaft 88 is revolved I through the worm gears 58and 59 and the links 39 turn upwardly or downwardly to either raise or lower the table through the links 40. The table will raise or lower according to the direction in whichthe hand ward direction, which, in turn, causes arm 22 to travel backwardly, which tightens said belt 1 by reason of the pressure exerted on pulley 26 through arm- 24, and in order to loosen said belt, the hand wheel 17 is reversed andthe parts act oppositely, and thus the belt is slackened.

Icprovidea lateral adjustment for belt 1, by means of the arm 24 being operated sidewise through agency of the hand wheel 28, which when turned will cause the arnr24 to travel sidewise, because of'its pivotal action on pin 23, which will in turn carry pulley 26 either to one side or the other as i 1 in which the adjustable means hearing on required.

The table 52 is die 54. I

In operation, the article to be sanded or polished is placed upon the table 52, and the operator presses the belt 1 down upon the said work with a pad which is usually held in the hand or hands, forcing the belt to contact with the work. 7

This pad held in the hands of the operator is made of a wooden form with a soft pad attached thereto, or is formed like; aflexible pushed in or out by hanpadand these pads being of different shapes and contours to properly sand the work or polish the same. The auxiliary pad 35 sup- "portedon the bracket 4 is used for sanding or polishing small articles which cannot properly be sanded upon the table 52.

lVhen theV-shape tracks become worn,

the V-pulleys 50 can be tightened or loosened so as to properly operate upon the tracks under such conditions. 1 V

lVhile I have described one specific means for carrying my invention into effect, it will be readily seen and understood that I may alter and change the same without departing from the spirit of the invention, the part shown, however, being of a preferred form.

lVhat I claim as new and my invention and desire to secure by Letters Patent is 1. A sanding machine including spaced standards, arms projecting upwardly from said standards, one of said arms being pivotally connected to the standard from which it extends and having a depending lever, adjustable means bearing on said lever for normally forcing the pivoted arm away from the other arm, pulleys on the arms and standards, a sanding belt looped over said pulleys and having upper and lower runs spaced apart to permit an operator to force the central portion of the lower rundownwardly, awork-table beneath the belt adapted to carry the article to be surfaced 'by the sanding belt, said pivoted arm consisting of upper and lower sections pivotally connectedtogether to permit the upper section to be shifted laterally, and means for adjusting the upper section relatively to the lower section. v

2. A sanding machine as claimed in claim said lever includes a bell-crank lever pi'votally mounted to swing about a horizontal Y -EDWARD J. FISCHER, 

